Rules Engine Plus Scheme Dictionary Approach Safe? Scales? Requires Backend Support? Use schema (OpenAPI, JSON Schema) ✅ ✅ Yes Use rules config (FIELD_RULES) ✅ ✅ No Infer from sample + multiple values (with thresholds, heuristics) ⚠️ Partial ⚠️ Sort-of No Guess from a single value only ❌ ❌ No